Not sure about the supercomputer but remember that the Supercomputer is testing a model of viral infectivity, and looking at drugs that could prevent the drug from being able to infect human cells. This would stop spread. Ifenprodil may impact viral spread (as I have eluded to before). Indeed, the first model of the super computer testing listed Algernon as a drug option. However, Algernon is specifically looking at Ifenprodil to decrease cytokine storm as you mention.
The most important thing to remember is that it;s an NMDA antagonist, and this will help dampen the glutamatergic hyper-excitability response and can prevent cell death. Probably has an impact on the microvascular leakage of the endothelium by decreasing the cytokines that increase the leakage.